Finding the config file path through an automated script

[slxdy]

Hey, I'm working on a cross-platform tool that attempts to find all Unity games installed on one's machine.
I'm currently trying to add support for the Heroic games launcher, but I can't find a common path for the config file.
The idea is to add support for Windows and Linux (all distros and all sources for Heroic).
What would be the best way to achieve this?